Real-time and selective detection of nitrates in water using graphene-based field-effect transistor sensors

2018 ◽  
Vol 5 (8) ◽  
pp. 1990-1999 ◽  
Author(s):  
Xiaoyan Chen ◽  
Haihui Pu ◽  
Zipeng Fu ◽  
Xiaoyu Sui ◽  
Jingbo Chang ◽  
...  
Keyword(s):  
Real Time ◽  
Field Effect ◽  
Field Effect Transistor ◽  
High Selectivity ◽  
High Sensitivity ◽  
Selective Detection ◽  
Graphene Field Effect Transistor ◽  
Effect Transistor ◽  
Modified Graphene ◽  
Benzyltriethylammonium Chloride

A benzyltriethylammonium chloride-modified graphene field-effect transistor sensor has high sensitivity, high selectivity and rapid response for nitrate detection.

Real-time monitoring of geosmin based on an aptamer-conjugated graphene field-effect transistor

2021 ◽  
Vol 174 ◽  
pp. 112804
Author(s):  
Seon Joo Park ◽  
Sung Eun Seo ◽  
Kyung Ho Kim ◽  
Sang Hun Lee ◽  
Jinyeong Kim ◽  
...  
Keyword(s):  
Real Time ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Real Time Monitoring ◽  
Graphene Field Effect Transistor ◽  
Effect Transistor

scholarly journals A Sensitivity-Enhanced Electrolyte-Gated Graphene Field-Effect Transistor Biosensor by Acoustic Tweezers

Micromachines ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1238
Author(s):  
Yan Chen ◽  
Wenpeng Liu ◽  
Hao Zhang ◽  
Daihua Zhang ◽  
Xiaoliang Guo
Keyword(s):  
Field Effect ◽  
Field Effect Transistor ◽  
High Sensitivity ◽  
Acoustic Resonator ◽  
Medical Applications ◽  
Biomolecule Detection ◽  
Graphene Field Effect Transistor ◽  
Effect Transistor ◽  
Acoustic Tweezers ◽  
Biological And Medical Applications

Low-abundance biomolecule detection is very crucial in many biological and medical applications. In this paper, we present a novel electrolyte-gated graphene field-effect transistor (EGFET) biosensor consisting of acoustic tweezers to increase the sensitivity. The acoustic tweezers are based on a high-frequency bulk acoustic resonator with thousands of MHz, which has excellent ability to concentrate nanoparticles. The operating principle of the acoustic tweezers to concentrate biomolecules is analyzed and verified by experiments. After the actuation of acoustic tweezers for 10 min, the IgG molecules are accumulated onto the graphene. The sensitivities of the EGFET biosensor with accumulation and without accumulation are compared. As a result, the sensitivity of the graphene-based biosensor is remarkably increased using SMR as the biomolecule concentrator. Since the device has advantages such as miniaturized size, low reagent consumption, high sensitivity, and rapid detection, we expect it to be readily applied to many biological and medical applications.

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